JP3933391B2 - Waste liquid detection device for printing press - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a waste liquid detection device in an offset printing machine, for example.
[0002]
[Prior art]
For example, in a conventional offset printing machine, since it is necessary to clean the blanket cylinder and the ink roller periodically, a cleaning device that cleans the blanket cylinder and the ink roller with a cleaning liquid is generally provided. It is.
[0003]
And the waste liquid after washing | cleaning is stored by the drainage tank arrange | positioned in the predetermined position of a printing machine. The current situation is that the operator discards the waste liquid collected for each cleaning process from the drainage tank.
[Problems to be solved by the invention]
[0004]
In the printing press, since the cleaning operation must be performed periodically, handling of waste liquid after cleaning becomes an important issue. For example, if the operator neglects the waste liquid operation, the waste liquid may overflow from the drain tank, or if the drain tank is not set in place, There was no means of informing about abnormal situations such as trapping.
[0005]
In the present invention, the detection means detects that a predetermined amount of waste liquid is stored in the drainage tank, or whether the drainage tank is stored in a predetermined position so that the waste liquid after washing can be reliably discarded. It is an object to enable easy and reliable handling of waste liquid by detecting whether or not.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention has been made as a waste liquid detection device in a printing press. The feature of the present invention is that it can be freely put in and out of a storage chamber provided in the printing press and the printing press by a cleaning device A drainage tank with an open top surface for storing waste liquid that has been cleaned, an opening / closing lid that opens and closes an opening for taking in and out the drainage tank in the storage chamber, and an opening / closing lid that rotates upward when the opening / closing lid is opened. A sensor fixing part that pivots downward when closed, and is fixed to the sensor fixing part. When the opening and closing lid is opened and the sensor fixing part pivots upward, it is above the drainage tank accommodated in the accommodating chamber. Ascending, it becomes a standby position where the drainage tank can be taken in and out, and when the opening / closing lid is closed and the sensor fixing part rotates downward, it becomes a cleaning liquid detection position for detecting the cleaning liquid level desired in the drainage tank. in composed of liquid surface detection cell And Sa is rotatably pivotally supported on the sensor fixing section so as to be repositioned and blocked release position and blocking position detected escaping from the detection range of the liquid level detection sensor by the liquid level detection sensor it and a Saegi閉means, the sensor mount is in contact with the stopper is provided on the Saegi閉means when rotated upward, the Saegi閉means, said lid opens transfected the stopper rises to while abutting becomes the blocking position, it abuts with the unblocking position the drainage tank to said drainage tank and close the lid at the accommodated state to the receiving chamber, wherein It is to characterized in that it is configured to the drainage tank serving as the disengage position rotated downward closing the lid in a state that does not accommodated in the accommodation chamber.
[0008]
Furthermore, the liquid level detection sensor is configured to detect the liquid level when the liquid level of the waste liquid stored in the drainage tank rises to a predetermined height, and the blocking means is arranged at the blocking position. is composed from the sensor blocking plate having a detection portion for escaping from the detection range of the liquid level detection sensor in said unblocking position located in front of the liquid surface detection sensor, the detection section, in the blocking position, the liquid surface detection It is preferable that the liquid level detection sensor is closer than the predetermined height of the liquid level detected by the sensor.
[0009]
Furthermore, flange pieces project from both side walls extending in the direction of taking in and out of the drainage tank, and the blocking means closes the open / close lid in a state where the drainage tank is accommodated in the accommodation chamber. contact with a said unblocking position Rukoto preferably the flange pieces and.
[0010]
Further, the sensor fixing portion is configured to rotate upward when the opening / closing lid is opened via a link pivotally supported by the opening / closing lid, and to rotate downward when the opening / closing lid is closed. preferable.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 7 show an embodiment, and in FIGS. 4 and 5, 1 denotes an offset printing machine. The offset printing machine 1 includes a cleaning device 2 having one or a plurality of bottles 3 filled with a cleaning liquid for cleaning printing machines such as blanket cylinders and ink rollers provided in a printing unit (not shown). I have. Then, the waste liquid after washing is recovered by the waste liquid recovery device 5. The waste liquid recovery apparatus 5 includes a discharge pipe 7 that discharges the cleaned cleaning liquid to the outside of the offset printing machine 1, and a waste liquid detection device 9 that is provided at an end portion on the outlet side of the discharge pipe 7. The cleaning device 2 is provided with an operation lever 2a that can freely swing to stop the flow of the waste liquid after cleaning from flowing toward the discharge pipe 7. It is also possible to provide means for driving the operating lever 2a (driving means such as a cylinder mechanism or a motor). In the case of only the operation lever 2a, the operation lever 2a constitutes a supply stop means, and when means such as a cylinder mechanism is further provided, the means such as the operation lever 2a and the cylinder mechanism serve as a supply stop means. Constitute.
[0013]
On one side of the offset printing press 1, there is provided a step 10 comprising a frame on which an operator can go up and down. The step 10 is higher than the installation surface 4 of the printing press 1 by a predetermined height, has a storage chamber 5a therein, and an end portion of the step 10 is opened. As shown in FIGS. 1 to 3, the upper part of the opening / closing lid 15 for closing the opening 12 so as to be freely opened and closed is pivotally supported on both walls of the step 10 via the pivot shaft 17. Yes.
[0014]
As shown in FIGS. 1 to 3, the waste liquid detection device 9 includes a drain tank 19 in which waste liquid discharged through the discharge pipe 7 is stored, and a waste liquid stored in a predetermined amount in the drain tank 19. A liquid level detection sensor 20 as a waste liquid detection means for detecting water and a sensor support means 21 for supporting the sensor 20. The drain tank 19 has a capacity capable of storing waste liquid discharged in a plurality of washing steps. Reference numeral 22 denotes a pipe having an elastic force fitted to the tip of the discharge pipe 7 and capable of being bent.
[0015]
The drainage tank 19 is accommodated in the accommodating chamber 5a of the step 10 so as to be freely put in and out. The drainage tank 19 has an upper surface opened, and casters 24 are attached to the lower four corners thereof. Further, as shown in FIG. 7, flange pieces 25 project in the lateral direction on both side walls 19 a in the traveling direction (in / out direction) of the drainage tank 19, and both of the drainage tank 19 on the traveling direction side. A handle 26 is provided on each wall 19b.
[0016]
The sensor 20 is preferably a capacitance sensor that can detect the liquid level when, for example, the amount of waste liquid increases and the liquid level rises to a predetermined height, but is not particularly limited.
[0017]
The sensor support means 21 comprises a link mechanism including a first link 28, a second link 29 and a sensor fixing portion 30. One end of the first link 28 is pivotally supported on the upper end of the opening / closing lid 15 via a pivot shaft 32, and the other end is pivotally supported on one end of the second link 29 via a pivot shaft 33. Yes. The other end of the second link 29 is pivotally supported via a pivot shaft 35 on a stay 34 fixed to the step 10 side. The sensor fixing portion 30 is integrally formed at the other end of the second link 29 by bending a metal plate.
[0018]
The sensor 20 is inserted downward into an insertion hole formed in the sensor fixing portion 30 and is fixed by a pair of nuts 37 and 37. Accordingly, when the opening / closing lid 15 is opened / closed, the link mechanism is operated in conjunction with the opening / closing operation. This link mechanism has a cleaning liquid detection position A where the sensor 20 can be detected in the liquid discharge tank 19 and can detect the liquid level, and a standby state where the liquid discharge tank 19 can be taken in and out by retreating upward from the liquid discharge tank 19. The position can be changed to position B.
[0019]
A part of the edge of the sensor fixing portion 30 is bent upward as shown in FIG. 6, and an upper portion of an L-shaped sensor blocking plate 41 as a blocking means is provided at the bent portion 30. It is pivotably supported via 43. The sensor blocking plate 41 has a detection unit 41 a located on the front surface of the sensor 20. The detection unit 41a is closer than the detection distance of the liquid level at the blocking position so that the sensor 20 generates a signal indicating the detection of the liquid level. Here, the sensor 20 and the sensor blocking plate 41 constitute a drainage tank detecting means for detecting that the drainage tank is not present at a predetermined position.
[0020]
In addition, on the back side of the sensor blocking plate 41, a rollable roller (for example, a bearing or the like) 44 is provided. The roller 44 abuts on the flange piece 25 of the drainage tank 19. When the roller 44 is positioned on the flange piece 25, the sensor blocking plate 41 is pushed up, so that the detection unit 41a escapes from the detection range of the sensor 20 (blocking release position). For this reason, the sensor 20 does not emit a signal by the detection unit 41a.
[0021]
In addition, a stopper 45 for horizontally positioning the sensor blocking plate 41 that rotates downward under its own weight at the blocking position is provided on the sensor fixing portion 30 in a protruding manner. Therefore, when the sensor 20 reaches the standby position B, the stopper 45 can be positioned at the blocking position without rotating the sensor blocking plate 41 downward.
[0022]
The signal from the sensor 20 is sent to a control device (not shown), and the control device stops the cleaning device, for example, based on the signal (by swinging the operation valve 2a in the closing direction by a cylinder mechanism or the like). The cleaning liquid is prevented from flowing into the drainage tank 19. In addition, the control device can operate an alarm device provided as appropriate.
[0023]
Next, the operation of the waste liquid detection device in the printing press will be described.
First, the drainage tank 19 is accommodated in the step 10 and the opening / closing lid 15 is closed. At this time, since the sensor 20 is at the cleaning liquid detection position A and the roller 44 is positioned on the flange portion 25 of the drainage tank 19, the sensor blocking plate 41 is pushed up to the blocking release position (see FIG. 1).
[0024]
When the printing process in the printing press 1 is completed, the cleaning device 2 is activated to clean predetermined parts of the printing unit with the cleaning liquid stored in the bottle 3, and the waste liquid passes through the discharge pipe 7 to the drain tank 19. Stored. When a plurality of cleaning operations are performed and the waste liquid in the drainage tank 19 reaches a predetermined liquid level, the sensor 20 detects the liquid level and generates a signal. Based on the signal from the sensor 20, the control device recognizes that the waste liquid cannot flow to the drain tank side in this state, and issues a predetermined instruction such as the operation of the alarm device or the stop of the cleaning device.
[0025]
For example, driving means such as a cylinder mechanism rotates the operation lever 2a to prevent waste liquid from flowing toward the discharge pipe 7, or the control device stops the cleaning device 2 by a signal from the sensor 20. Therefore, no further waste liquid is supplied to the drainage tank 19. An operator who has acknowledged the alarm may rotate the operation lever 2a to prevent the waste liquid from flowing.
[0026]
Since the operator can know that the drainage tank 19 is full by the alarm device, the operator opens the open / close lid 15. At this time, the link mechanism is activated, and the sensor 20 at the cleaning liquid detection position A is changed to the standby position B in conjunction with the opening operation of the opening / closing lid 15. That is, as shown in FIG. 2, when the opening / closing lid 15 is rotated upward about the pivot shaft 17, the first link 28 connected to the opening / closing lid 15 moves backward (arrow direction X). To do. The first link 28 rotates the sensor fixing portion 30 counterclockwise in the drawing in order to swing the second link 29 backward (arrow direction X) about the pivot shaft 35. As a result, the entire sensor 20 fixed to the sensor fixing unit 30 moves to a standby position B with the waste liquid moving upward from the drainage tank 19.
[0027]
The sensor blocking plate 41 rotates downward due to its own weight because the roller 44 is separated from the drainage tank 19, but is in contact with the stopper 45 and is positioned at the blocking position to maintain the state. As a result, the sensor 20 continuously outputs a signal indicating that the waste liquid is full in order to detect the detection unit 41a of the sensor blocking plate 41.
[0028]
Furthermore, the operator pulls out the drainage tank 19 with the handle 26 and discards the waste liquid in the drainage tank 19. Next, after the empty drainage tank 19 is accommodated again in the accommodation chamber 5a, the open / close lid 15 is closed. By closing the open / close lid 15, the first link 28 and the second link 29 move in the opposite direction, so that the sensor 20 is lowered to the cleaning liquid detection position A. Further, since the roller 44 contacts the flange portion 25 of the drainage tank 19, the sensor cutoff plate 41 stops at the cutoff release position.
[0029]
If the operator forgets to accommodate the drainage tank and accidentally closes the open / close lid 15, the roller 44 of the sensor blocking plate 41 does not contact the drainage tank 19 as shown in FIG. For this reason, the sensor blocking plate 41 maintains the state of the blocking position. As a result, the sensor 20 continues to output a signal indicating that the waste liquid is full. In this state, the control device recognizes that the waste liquid cannot flow to the drain tank side, and operates and cleans the alarm as described above. The operator can determine that the drainage tank 19 is not accommodated in a predetermined position because a predetermined instruction such as stopping the apparatus is continuously issued. FIG. 3 shows a state in which the sensor blocking plate 41 maintains the blocking position when the open / close door 15 is closed without storing the drainage tank 19 in the storage chamber 5a. The position when the tank 19 is accommodated is indicated by a virtual line.
[0030]
The present invention is not limited to the above-described embodiment. For example, it is preferable that the drainage tank is accommodated in Step 10 because it does not take up an accommodation place and does not get in the way. It is not necessary to house it inside, and a configuration arranged on the side of the printing press may be used.
[0031]
In the above embodiment, the sensor for detecting the liquid level of the waste liquid is employed as the detecting means. However, for example, by using a laser displacement sensor, the liquid level of the waste liquid is always detected, and the inside of the drain tank is It is also possible to measure the current amount of waste liquid stored in the tank. In such a case, the operator can always check the current amount of waste liquid stored in the drainage tank.
[0032]
Furthermore, although the single sensor 20 has a function of detecting the liquid level and a function of detecting the drainage tank, a dedicated sensor for detecting a drainage tank separate from the sensor 20 is used. Alternatively, the drainage tank may be directly detected by a separate sensor.
[0033]
【The invention's effect】
The present invention includes a drain tank that stores the waste liquid that has been washed by the cleaning device as described above, and a waste liquid detection unit that detects that the amount of the waste liquid stored in the drain tank has reached a predetermined amount. Since it is provided, the operator can surely know the disposal time of the waste liquid, and the waste liquid after washing a plurality of times can be discarded together easily and quickly.
[0034]
By accommodating the drainage tank in the storage chamber of the printing machine so that it can be taken in and out, the space in the step can be used effectively, and the drainage tank does not get in the way.
[0035]
The drainage tank is detachably accommodated in a storage chamber provided in the printing press, and the storage chamber is provided with an opening / closing lid for opening and closing an opening for taking in and out the drainage tank, and the waste liquid detection means If the position can be changed in conjunction with the opening / closing operation of the opening / closing lid, the position of the detection means can be changed separately. The drainage tank can be taken in and out with a simple operation. Further, it is possible to prevent an erroneous operation such as breakage of the waste liquid detection means by taking out and putting in the waste liquid tank while the waste liquid detection means is in the cleaning liquid detection position.
[0036]
A drainage tank for storing waste liquid that has washed the printing press by the cleaning device, and a drainage tank detection means that is freely stored in and out of a predetermined position of the printing press and detects that there is no drainage tank at the predetermined position. Therefore, it is possible to prevent the cleaning liquid from being accidentally discharged without the drain tank. As a result, the waste liquid after washing can be reliably discarded.
[0037]
Based on a signal from the waste liquid detection means or the drainage tank detection means, a supply stop means for stopping the supply of the waste liquid from the cleaning device is provided, so that when a predetermined amount of drainage is stored in the drainage tank, In addition, when the drainage tank is not set at a predetermined position, the supply of the waste liquid can be automatically stopped, and the overflow of the waste liquid can be prevented.
[Brief description of the drawings]
FIG. 1 is a cross-sectional front view showing an outline of a first embodiment of the present invention and a state in which an opening / closing lid is closed.
FIG. 2 is a cross-sectional front view showing the outline of the first embodiment of the present invention, with the open / close lid opened.
FIG. 3 is a cross-sectional side view schematically showing the first embodiment of the present invention and showing a state where a drainage tank is not accommodated.
FIG. 4 is a cross-sectional front view showing the outline of the first embodiment of the present invention and showing the whole.
FIG. 5 is a sectional side view showing the outline of the first embodiment of the present invention and showing the whole.
6A and 6B show a sensor mounting structure, where FIG. 6A is a plan view and FIG. 6B is a side view.
FIG. 7 is a perspective view showing the upper part of the drainage tank.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 2 ... Cleaning apparatus, 5a ... Accommodating chamber, 10 ... Step, 12 ... Opening, 15 ... Opening / closing lid, 19 ... Drainage tank, 20 ... Liquid level detection sensor (liquid level detection means), 21 ... Support means (sensor support means) ), 41: Sensor blocking plate (blocking means), A: Cleaning liquid detection position, B: Standby position

Claims (4)

A drainage tank having an open upper surface for storing waste liquid that is accommodated in a storage chamber provided in the printing press and is freely detachable and cleaned by the cleaning device;
An open / close lid for opening and closing an opening for taking in and out the drainage tank of the storage chamber;
A sensor fixing part that pivots upward when the lid is opened and pivots downward when the lid is closed;
A standby position that is fixed to the sensor fixing part, and that opens up the opening / closing lid and rotates the sensor fixing part upward so as to rise above the drainage tank accommodated in the accommodation chamber and allow the drainage tank to be taken in and out. And a liquid level detection sensor configured to be a cleaning liquid detection position for detecting a cleaning liquid level desired in the drainage tank when the opening and closing lid is closed and the sensor fixing portion rotates downward ,
Saegi閉means which is rotatably supported on the sensor fixing section so as to be repositioned and unblocking position to escape from the detection range of the liquid surface detection sensor and blocking position detected by the liquid level detection sensor And
The sensor fixing part is provided with a stopper that comes into contact with the blocking means when rotating upward.
The Saegi閉means, the opening and closing lid to the open-ku with the stopper raised while abutting becomes the blocking position, the and the drainage tank close the lid while accommodated in the accommodation chamber exhaust becomes the unblocking position in contact with the liquid tank, in that the drainage tank pivoted downward closing the lid in a state of not accommodated in the accommodation chamber is configured such that the blocking position A waste liquid detection device for a printing machine. The liquid level detection sensor is configured to detect the liquid level when the level of the waste liquid stored in the drainage tank rises to a predetermined height, and the blocking means is configured to detect the liquid level at the blocking position. is composed from the sensor blocking plate having a detecting portion located on the front surface detection sensor escape detection range of the liquid level detection sensor in the unblocking position, the detection portion is in the blocking position, the liquid level detection sensor The waste liquid detection apparatus for a printing press according to claim 1, wherein the liquid level detection sensor is closer to the liquid level detection sensor than a predetermined height of the liquid level to be detected. Flange pieces protrude from both side walls extending in the direction of taking in and out of the drainage tank, and the blocking means closes the open / close lid in a state where the drainage tank is accommodated in the accommodation chamber. waste detection apparatus in a printing machine according to claim 1 or 2 in contact with the flange piece and said Rukoto such as the unblocking position. The sensor fixing portion is configured to rotate upward when the opening / closing lid is opened via a link pivotally supported by the opening / closing lid, and to rotate downward when the opening / closing lid is closed. waste detection apparatus in a printing press according to any one of claims 1 to 3.

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